396 



HEKZEN AND EWING 



[chap. 16 



60% 70 80 . 90 100 110 



80 90 100 110 I 



>3650M /////>5500M v. EARTHQUAKES 



Fig. 7. A preliminary bathymetric chart of the Indian Ocean which shows the relation 

 of the epicenter belt to the rifted Mid-Indian Ocean Ridge and to the major topo- 

 graphic features of the Indian Ocean. This chart, drawn in 1956, fails to show the 

 recently discovered 90 East Ridge wliich extends from 10°N latitude to 40°S along 

 90°E longitude. 



